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51. | synchronous booster |
| 同步增压机,增压交流发电机 |
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52. | foaming booster |
| 泡沫增效剂 |
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53. | intensifier booster |
| 增强器 |
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54. | booster adjuster |
| 增压调节器 |
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55. | electrical booster |
| 电力升压器 |
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56. | ignition booster |
| 点火升压器 |
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57. | electric booster |
| 电升压器 |
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58. | booster /enhancer |
| 助燃剂/增强剂 |
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59. | milking booster |
| 补充充电的升压电机 |
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60. | booster alternator |
| 增速交流发电机;增压交流发电机 |
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